Type-writing machine.



WATNEEEE.

M. W. POOL.

TYPE WRITING MACHINE.

APPLICATION FILED Hum, 1911.

Patented Apr. 23, 1912.

2 suns-SHEET 1.

HEATTDRNEY M. W. POOL.

TYPE WRITING MACHINE.

APPLICATION FILED PEBJ, 1911 1,024,280,v Patented Apr.23,1912.

2 SHEETS-SHEET 2.

INV NTUR.

'l-IIE ATTEIRNEY hUNIIED STATES .PATENT OFFICE.

MORRIS W. POOL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE` ASSIGNMENTS, TOUNION TYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OFNEW JERSEY.

TYPE-WRITING MACHINE.

Specification. of Letters Patent.

Patented Apr. 23, 1912.

Application filed February 1, 1911. Serial No. 605,964.

To all whom it may concern:

Be it known that I, MORRIS W. POOL, citizen of the United States, andresident of the borough of Brooklyn, city of New York, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Type-Writing Machines, of which the following is aspecification.

My invention relates to paper feeding mechanisms for typewritingmachines and its main object is to provide improved clamping and stopdevices which are especially adapted for use in connection with stencilsheets or other stiff work she-ets,lalthough various features of saidinvention may be advantageously employed for controlling thinner sheetsthan the ordinary stencil sheet.

To the above and other ends my invention consistsin the features ofconstruction, combinations of devices and arrangements of partshereinafter described and particularly pointed out in the claims.

Vhile my invention may be adapted to various styles of writing machinesI have preferred to show it applied to a Monarch front-striketypewriting machine and in connection with clamping and paper stopmechanism of the general style forming the subject-matter of the pendingapplication of Jacob Felbel, Serial No. 604,809, filed January 26, 1911.

In the accompanying drawings, Figure 1 is a fragmentary front elevationof the platen frame and platen of a Monarch typewriting machineembodying my invention. Fig. 2 is a transverse sectional view of saidplaten and platen frame. Fig. 3 is a fragmentary transverse sectionalview taken on planes represented by the broken line .fc-av in Fig. 1 andshowing parts in different relations from those in which they appear inFig. 2. Fig. 4 is a sectional view similar to Fig. 3 but sho-wing amodification. Fig. 5 is a view similar to Fig. 1 but showing stillfurther variations in the clamping and gaging means. Fig. 6 is a viewsimilar to Fig. 2 illustrating in vertical cross section theconstruction shown in Fig. 5. Fig. 7 is a fragment-ary sectional viewsimilar to Fig. 6 showing the parts in clamping condition. Fig.v 8 is anenlarged detail sectional view illustrating more clearly the cardengaging devices shown in Figs. 5, 6 and 7. Fig.`9 is a longitudinalhorizontal section illustrating the construction and mode of mounting ofthe movable or spring-pressed gage bar and its relation to the clampingtongues. Fig. 10 is a similar view showing the fixed gage barillustrated in Figs. 1 to 4.

Referring to Figs. 1 and 2 of the drawings a rotary platen comprising asheath 1, a core 2 and platen heads 3 and 4, is supported on an axle 5provided with finger wheels 6 and bearing in the end bars 7 of a platenframe or carrier which further comprises a connecting slide bar 8 andframe rod 9. The platen frame cooperates through anti-friction balls 81with fixed track-ways 10 which are mounted on the frame of the machine(not shown). It will be understood that the platen is equipped withusual or other suitable line spacing devices, although these do notappear in the drawings, said devices operating to turn the platenstep-bystep in the printing direction. AThe extent of movement of theplaten in this direction is limited by a stop finger 11 which coperateswith the frame rod 9, said stop finger projecting radially from acircular plate 12 suitably secured to the plat-en head 3. A handcontrolled pressure device or rod 13 extends lengthwise of the platenabove the printing line and is adapted to coperate with the platen tocontrol the work sheet above the printing line, said rod being adaptedto be swung at will toward and away from the platen as shown more fullyin Figs. 5 and 6. This rod 13 is secured at its ends to arms 13apivotally mounted on the cross bar 9, said arms having handles or fingerpieces 13b and sleeves 13c which surround and support said arms on thecross bar 9. To one of the sleeves 13c is attached one end of a coiledspring 13d the opposite end of which is secured to the rod 9 and thetension of this spring is such that normally it presses the rod 13 intocontact with the surface of the platen.

The stencil clamping devices comprise a plate 14 of spring metal whichcurves partly around the platen and extendslengthwise thereof. Theclamping plate 14 is secured -along one of its longitudinal edges to theplaten by screws 15, and is formed with transverse slots 16 to provide aseries of parallel tongues or fingers 17 which extend transversely ofthe platen and the free ends or tips of which co-act with the platen forIclamping purposes. The stencil clamping plate 14 is arranged midway ofthe length of the platen and the length of said plate is preferably thesame substantially as the length of the stencil sheet that is to beused. The spring of the metal of which the plate 14 is made issufficient to maintain the tongues 17 normally operative against theplaten with a clamping or gripping pressure. In order to open the clampto permit the insertion of the stencil or other worksheet, handcontrolled devices are employed, said devices comprising a rotary camrod or rock shaft 18 having a flattened face 19, said cam rod beingpartially seated in a depression in the platen and extending lengthwiseof the platen behind the tongues 17 and near the roots thereof. The camrod bears at its left end in a lug 2O on the platen head 4 while theright-hand end bears in a lug on the plate 12. The bearing end portionsof said rod are reduced in diameter so.

as to form shoulders that coperate with the bearings on the platen toprevent endwise movements of said rod. A crank arm 21 having a collar 22pinned at 23 to the reduced end portion of the rod or shaft 18 at theright of the plate 12, carries a finger piece or handle 24 by which t-herod or shaft 18 may be turned on its axis. At the opposite side of itsaxis from the finger piece 24 the arm 21 is provided with branches 25and 26 which serve as stops, coperating with a stud or stop device 27 onthe plate 12 to limit turning movements of the rod or stud 18. When thehandle is pushed' rearward so that the stop 25 coperates with the stop27 the flat face 19 coperates with the spring fingers, permitting saidfingers to lie against the platen or closely to grip the paper thereon.l/Vhen, however, the handle 24 is pulled in the opposite direction andthe stop 26 brought into engagement with the stop 27, the rod or shaft18 will be turned until the circular'part thereof engages with thespring fingers. This circular part being farther from the axis ofrotation of the rock shaft or rod 18 than is the flat 19, said shaft orrod will in consequence exert a camming action on the fingers and forcethem away from the platen, thus opening the clamp as/shown in Fig. 2.Prior to the opening of the clamp the platen has preferably been turnedforward until arrested by the engagement of the stop finger 11 with theframe rod 9, thus turning the clamp into a position for receiving thestencil plate when it is introduced into the machine between the platenand the pressure rod 13 which is yieldably mounted so that theintroduction of the stencil sheet is facilitated. The clamping devicesthus far described correspond substantially with those shown in theFelbel application aforesaid, except that the clamping plate ispreferably of slightly heavier metal having more inherent clamping poweror springiness, and is somewhat wider than the one of the application inorder to adapt it for the heavy stencil sheet.

As in the Felbel application, a stop device or gage independent of theclamping fingers, is mounted on the platen. In the present instance saidstop device comprises a stop bar or gage 28 which extends transverselyof the set of clamping fingers and is arranged near their free ends ortips. Said stop bar or gage is preferably fixed to the platen in anysuitable way as by driving it into a kerf or slot cut in the platensheath, or by fitting it therein and fastening it by screws 28a. Thesurface of the bar proper may be flush with the platen surface but isformed with a series of stop projections or teeth 29 which projectradially of the platen through the slots 16 of the paper clamp andbetween the tongues 17 thereof. These teetlLor stop devices 29 projectoutward to such an extent that even when the clamp is fully opened as inFig. 2, it will not havemoved beyond the ends of the stop teeth. Thefeature is one to which considerable importance is attached, for thereason that it entirely obviates any chance of the paper or work sheetslipping do-wn past the leading edge stop when the clamp is opened asmight occur sometimes in prior constructions. The slipping down is, ofcourse, more liable to occur when the work sheet is thin than wit-h astencil sheet, and I do not wish to be understood as conning the use ofthis part of my invention to a stencil clamping device. It will beunderstood that the toothed stop bar 28, 29, or its equivalent, may besecured to the platen as described, so that the stop projections areimmovable with respect to the platen; or, if found desirable, the stopsmay be movably mounted onl the platen as in Figs. 5, 6, 7, and 9.

As best appears from Figs. 1 and 2 the end tongues of the stencil clampare each provided near their tips and above the end stop device 28, 29with inwardly projecting studs 30, the end portions of which preferablyengage normally in slight depressions or seats 31 in the platensheath 1. These studs are adapted to enga-ge the stencil sheet to clampor hold it positively to the platen. As is well understood, the stencilsheet comprises a rectangular frame 32 usually of rather t-hickcardboard, thin stencil paper 33 being suitably secured to the back ofthis frame as by an adhesive. In the present instance the lower cornersof the frame 32 are punched to provide round holes 34 in which the stops30 are adapted to fit.

Then the platen has been turned and arrested in the Fig. 2 position andthe clamp has been opened as shown therein by pulling forward the handle24, the stencil sheet is inserted by passing it down between the platenand the pressure rod 13 until said stencil sheet is arrested by thestops 29. In this operation the pressure rod 13 may be swung away fromthe platen by hand or, if preferable, the stencil sheet may simply bepushed down against the rod 13 with sufiicient pressure to'push the rodaway from the platen surface to the extent shown. In order to adjust thestencil sheet in the proper position lengthwise of the platen and sothat when arrested by the stops 29, the holes 311 will be opposite thestuds 30, a side guide of suitable character is provided to coperatewith the left-hand edge of the stencil sheet, the side guide shown inthe drawings being mounted on the rod 9 and curving down over the topand front of the platen terminating in the vicinity of the pressure rod13. After the stencil sheet has been adjusted as shown in Fig. 2 theclamp is closed by pushing rearward against the handle 211, permittingthe fingers 17 to swing back toward the platen and engage the lower partof the stencil frame 32. The studs 30 will pass through the holes 34 inthe stencil sheet and will seat themselves in the depressions 31 in theplaten while in addition the tips or end portions of all of theintermediate tongues 17 will clamp or grip the stencil frame tightly tothe platen. Thus it will be seen the stencil sheet will be positivelyconnected at its lower corners to the platen through the studs 30 andwill in addition be frictionally clamped all along its lower edgebetween said corners. Thereafter the platen is turned backward intoposition to begin the first line of writing. During this backwardturning movement the stencil sheet will be fed backward by the clamp andwill slide under the stationary pressure rod 13 which will hold it closeto the platen. After the first line has been printed the platen may beline spaced, causing the stencil sheet to advance under the control ofthe clamp; and so on until the writing has been completed, when theclamp may be opened by pulling forward the handle 211 so as to permitthe completed stencil sheet to be removed and a fresh one inserted inits place.

In Fig. f1 I have shown a modified construction wherein a clamping plate36 is secured to the platen as before, but the clamping fingers 37 ofthe clamping plate 36 are, with the exception of the two outsidefingers, bent inward at their tops as indicated at 37a so as to provideangular hook-like portions which are adapted to project inward over andengage flange-like with the top edge of the lower horizontal portion ofthe stencil frame. Thus the set of hooks 37a and the stop bar 28 willoperate to prevent up and down movements of the stencil frame relativelyto the platen, and the stencil frame and clamping member will interlockas in the Fig. 3 construction. The stencil frame is held positivelyconnected to the platen all along its lower edge except that the twooutside clamping fingers are plain and have no hooks or bends, thusenabling the outside fingers to engage frictionally only with theupright or side portions of the stencil frame 32.

Referring more particularly to the construct-ion shown in Figs. 5 to 8inclusive, the only changes from the previously described constructionsare in the mounting of the stop or gage bar and in the form ofconstruction of the sheet or card engaging devices. The stop bar or gagein Figs. 5 to 9 inclusive is loosely or inovably mounted in the slot 23hand is provided at each end with a lug or pin 28C housed in a depressionin the platen and surrounded by a coiled spring 28d which tends normallyto press the gage bar outwardly against the spring tongues 17. Thesetongues or some of them are provided on their inner sides near theirupper free ends with sharp points or projections 17 a adapted to pierceand seat themselves into the bottom portion of the card or othersubstance used to be written upon (as illustrated best at Fig. 8 on amagnified scale) for the purpose of positively impaling, engaging orinterlocking with the card or the like to keep it in exact position andagainst all shifting movements relatively to the gage and the platenwhile the line spacing and printing operations take place. Preferablysome of the spring tongues as shown in Fig. 5 are made wit-hout theseimpaling or indenting points 17a so that they may engage the cardfrictionally. Excepting for the variations described the constructionshown in Figs. 5 to 9 operates on the same principle as the constructionshown in Figs. 1 to 3.

It will be observed that in the several described constructions thepaper clamp comprises a plurality of clamping devices or spring fingers,certain of which fingers are provided with devices or projections whichproject inward past the outer face of the work sheet and positivelyinterlock with the saine; that these devices clamp the sheet positivelyas distinguished from a mere frictional clamping; also that stops orprojections extend radially outward from the platen between the grippingor clamping fingers, and that these stops are of such length that whenthe clamp is fully opened it will not pass or clear the ends of thestops, so that at no time can the card or sheet slip down past thestops.

Some of the features shown herein are not claimed as they are theinvention of Herbert I-I. Steele and form in part the subject-matter ofhis application, Serial No. 657,439 filed Oct. 30, 1911.

Various changes may be made without departing from my invention.

lVhat I claim as new and desire to secure by Letters Patent, is

l. In a typewriting machine, the combination of a platen, a paper clampmounted on the platen and comprising a device for positively engaging awork sheet through an opening therein, and means for moving said device.in and out through said opening.

2. In a typewriting machine, the combination of a platen, and a clampingplate provided with a plurality of parallel spring clamping fingersextending transversely of the platen and engagea-ble with one edge of awork sheet, certain of said fingers being provided with projections forpositively engaging said work sheet, the platen being provided withdepressions for receiving the ends of' said projections.

8. In a typewriting machine, the combination with a platen, a leadingend stop, and a side edge guide, of' a stencil clamp mounted on theplaten comprising a clamp proper provided with devices for positivelyengaging openings in the leading end portion of the work sheet.

4t. In a typewriting machine, the combination with a platen, a leadingend stop, and a side guide', of a stencil clalnp mounted on the platencomprising a clamp proper having devices for positively engagingopenings in the leading end portion of the work sheet, and also handcontrolled means for at will opening and closing the clamp.

5. In a typewriting machine, the combi# nation of a platen, a stop barmounted on the platen and provided with integral stop projections, and aplurality of spring clamping fingers formed on a common support, saidfingers being coperative with the platen between said projections.

6. In a typewriting machine, the combination of a platen, a singlemember provided with a plurality of leading end stops, said member beingsecured to said platen, and a plurality of spring clamping fingerscooperative with the platen bewteen said stops. 1

7. In a typewriting.machine, the combination of a platen, a clampmounted thereon and comprising a plurality of parallel clamping fingersextending transversely of the platen, means for moving the fingers awayfrom and toward the platen to open and close the clamp, and a bar seatedin a depression in a platen and provided with a plurality of stopprojections between said fingers and extending outward past the innerfaces of said fingers in both the opened and closed positions of saidfingers.

Signed at the borough of Manhattan, city of New York, in the county ofNew York, and State of New York, this 31st day Aof January A. D. 1911.

MORRIS W. .POOL

Witnesses:

HAROLD E. SMITH, E. M. IVELLs.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D C.

